Petaluma Municipal Code § 4.60 Landscape and Utility Standards

Landscape features within the Transect Zones shall be designed and installed in compliance with the standards in

Zones shall be designed and installed in compliance with the standards in 4.70.020, 4.70.030, 5.10.060 and

6.10.050.

A. Street trees, by virtue of a narrow tree trunk, provide transparency at the pedestrian’s eye level, permitting a

visual grasp of extensive areas of a city.

B. The type, spacing, structure and pattern of street trees create a discrete rhythm that results from the

arrangement of trees, expressing the particular site.

C. Street trees create a smaller scale of space with their canopies that are sympathetic to the movement and

perception of pedestrians.

D. The diversity of individual trees is subordinated to the repetitive pattern of the whole, which uniTes the

individual parts into a single whole.

E. Street trees, when formed from a single tree species, create homogeneity of texture, pattern, light and shade,

resulting in a collective impact that is more important than the individual trees.

F. The ground surface is visually unobstructed to permit a clear expression of trees rising out of the ground.

Wherever possible, continue established street tree planting in terms of tree species.

A. Planting patterns. Street trees shall be planted per Section 5.10.060 (Public Frontages).

B. Planting details. Street trees shall be planted per City of Petaluma Street Tree Planting Detail, page 101, with

the addition of structural soil (see below). Install root barriers as required per City of Petaluma Root Barrier

Standard Detail Number 102.

C. Soil. Placement of structural soil 8’ minimum length along the street, centered on street tree, 6’ minimum

wide x 24” minimum deep is required as a planting medium under sidewalks for street trees in areas where new

sidewalks are to be constructed.

D. Mulch. Mulch shall be walk-on mulch.

E. Irrigation. Irrigation shall be provided for street trees in areas where new sidewalks are to be constructed.

“Bladder” type irrigation may be provided by the City of Petaluma to existing sidewalk areas on a case by case

basis.

All electric and telephone facilities, Tre alarm conduits, street lighting wiring, cable television and other wiring

conduits, and similar facilities shall be placed underground by the developer. Wireless telecommunications

facilities are instead subject to the Zoning Ordinance. The Council may grant a modiTcation, including a complete

waiver of this undergrounding requirement, after considering:

A. The purposes and nature of the proposed development;

B. The extent to which utilities are undergrounded in the site vicinity; and

C. Potential adverse eWects on the image of the City and the aesthetics of the site vicinity if the utilities are not

undergrounded.